64435572 has 36 divisors (see below), whose sum is σ = 163153536. Its totient is φ = 21442320.

The previous prime is 64435571. The next prime is 64435583. The reversal of 64435572 is 27553446.

64435572 is a `hidden beast` number, since 64 + 43 + 557 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64435571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28093 + ... + 30299.

Almost surely, 2^64435572 is an apocalyptic number.

It is an amenable number.

64435572 is an abundant number, since it is smaller than the sum of its proper divisors (98717964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64435572 is a wasteful number, since it uses less digits than its factorization.

64435572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3028 (or 3023 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 64435572 is about 8027.1770878684. The cubic root of 64435572 is about 400.9053907893.

The spelling of 64435572 in words is "sixty-four million, four hundred thirty-five thousand, five hundred seventy-two".